/*
 * Copyright 2015-2019 The OpenZipkin Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package zipkin2.server.internal.prometheus

import com.linecorp.armeria.spring.ArmeriaServerConfigurator
import org.assertj.core.api.Assertions.assertThat
import org.junit.After
import org.junit.Test
import org.springframework.boot.actuate.autoconfigure.metrics.MetricsAutoConfiguration
import org.springframework.boot.actuate.autoconfigure.metrics.export.prometheus.PrometheusMetricsExportAutoConfiguration
import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration
import org.springframework.boot.test.util.TestPropertyValues
import org.springframework.context.annotation.AnnotationConfigApplicationContext

class ZipkinPrometheusMetricsConfigurationTest {
  val context = AnnotationConfigApplicationContext()
  @After fun closeContext() = context.close()

  @Test fun providesHttpRequestDurationCustomizer() {
    refresh()

    context.getBeansOfType(ArmeriaServerConfigurator::class.java)
  }

  @Test fun defaultMetricName() {
    refresh()

    assertThat(context.getBean(ZipkinPrometheusMetricsConfiguration::class.java).metricName)
      .isEqualTo("http.server.requests")
  }

  @Test fun overrideMetricName() {
    TestPropertyValues.of("management.metrics.web.server.requests-metric-name:foo").applyTo(context)
    refresh()

    assertThat(context.getBean(ZipkinPrometheusMetricsConfiguration::class.java).metricName)
      .isEqualTo("foo")
  }

  fun refresh() {
    context.register(
      PropertyPlaceholderAutoConfiguration::class.java,
      MetricsAutoConfiguration::class.java,
      PrometheusMetricsExportAutoConfiguration::class.java,
      ZipkinPrometheusMetricsConfiguration::class.java
    )
    context.refresh()
  }
}
